Fujifilm Xeon DP S26361-F3310-L280 데이터 시트
제품 코드
S26361-F3310-L280
76
Datasheet
6.2.5
THERMTRIP# Signal Pin
Regardless of whether or not Thermal Monitor is enabled, in the event of a catastrophic cooling
failure, the processor will automatically shut down when the silicon has reached an elevated
temperature (refer to the THERMTRIP# definition in
failure, the processor will automatically shut down when the silicon has reached an elevated
temperature (refer to the THERMTRIP# definition in
). At this point, the system bus
signal THERMTRIP# will go active and stay active as described in
. THERMTRIP#
activation is independent of processor activity and does not generate any bus cycles.
6.2.6
T
CONTROL
and Fan Speed Reduction
T
CONTROL
is a temperature specification based on a temperature reading from the thermal diode. The
value for T
CONTROL
will be calibrated in manufacturing and configured for each processor. The
T
CONTROL
temperature for a given processor can be obtained by reading the IA-
32_TEMPERATURE_TARGET MSR in the processor. The T
CONTROL
value that is read from the
IA-32_TEMPERATURE_TARGET MSR must be converted from Hexadecimal to Decimal and
added to a base value. The base value is 50 °C.
added to a base value. The base value is 50 °C.
The value of T
CONTROL
may vary from 0x00h to 0x1Eh. Systems that support the Low Voltage
Intel
®
Xeon™ processor with 800 MHz system bus must implement BIOS changes to detect which
processor is present, and then select the appropriate Tcontrol_base value.
When T
DIODE
is above T
CONTROL
, then T
CASE
must be at or below T
CASE_MAX
as defined by the
thermal profile. The processor temperature can be maintained at T
CONTROL
.
6.2.7
Thermal Diode
The processor incorporates an on-die thermal diode. A thermal sensor located on the system board
may monitor the die temperature of the processor for thermal management/long term die
temperature change purposes.
may monitor the die temperature of the processor for thermal management/long term die
temperature change purposes.
and
provide the diode parameter and interface
specifications. This thermal diode is separate from the Thermal Monitor’s thermal sensor and
cannot be used to predict the behavior of the Thermal Monitor.
cannot be used to predict the behavior of the Thermal Monitor.
NOTES:
1. Intel does not support or recommend operation of the thermal diode under reverse bias.
2. Characterized at 75°C.
3. Not 100% tested. Specified by design characterization.
4. The ideality factor, n, represents the deviation from ideal diode behavior as exemplified by the diode
2. Characterized at 75°C.
3. Not 100% tested. Specified by design characterization.
4. The ideality factor, n, represents the deviation from ideal diode behavior as exemplified by the diode
equation: I
FW
= I
S
* (e
qVD/nkT
- 1)
Where I
S
= saturation current, q = electronic charge, VD = voltage across the diode, k = Boltzmann Constant,
and T = absolute temperature (Kelvin).
5. The series resistance, R
T
, is provided to allow for a more accurate measurement of the junction temperature.
R
T
, as defined, includes the pins of the processor but does not include any socket resistance or board trace
resistance between the socket and external remote diode thermal sensor. R
T
can be used by remote diode
thermal sensors with automatic series resistance cancellation to calibrate out this error term. Another
application that a temperature offset can be manually calculated and programmed into an offset register in
the remote diode thermal sensors as exemplified by the equation: T
application that a temperature offset can be manually calculated and programmed into an offset register in
the remote diode thermal sensors as exemplified by the equation: T
error
= [R
T
* (N-1) * I
FW_min
] / [nk/q *ln N]
Where T
error
= sensor temperature error, N =sensor current ratio, k = Boltzmann Constant, q= electronic
charge.
Table 25.
Thermal Diode Parameters
Symbol
Symbol
Min.
Typ.
Max.
Unit
Notes
I
FW
Forward Bias Current
11
187
µA
1
n
Diode ideality factor
1.0083
1.011
1.0183
2,3,4
R
T
Series Resistance
3.242
3.33
3.594
W
2,3,5